TIL 1: PendingIntent & WorkManager

Mahmoud Mabrok Fouad — Mon, 17 Jan 2022 19:19:42 +0000

Today I learned a.k.a TIL a series of posts where I share staff i learned daily.

PendingIntent

I was developing a Notification-App and used PendingIntent with Notification and faced a case that seems strange.

The case is that PendingIntent open Activity with with extra string but when two Notifications comes with two different strings when clicked on both i got first string of them in two cases while i expect getting two different strings.

        // Create an explicit intent for an Activity in your app
        val intent = Intent(context, MainActivity::class.java).apply {
            flags = Intent.FLAG_ACTIVITY_NEW_TASK or Intent.FLAG_ACTIVITY_CLEAR_TASK
            putExtra(AppConstants.NOTIFICATION_EXTRA_TITLE, title)
            putExtra(AppConstants.NOTIFICATION_EXTRA_MESSAGE, message)
        }


        val pendingIntent: PendingIntent =
            PendingIntent.getActivity(context,0, intent, 0)

The issue

was that two PendingINtent have same requestCode (second params of getActivity())

The solution

is two have unique/disticnt request code

  val pendingIntent: PendingIntent =
            PendingIntent.getActivity(context, Random.nextInt(), intent, 0)

Random.nextInt() made the trick for me.

WorkManager

To schedule the notification I have used WorkManager but want to make the request be unique so as not to be scheduled each time user open the app.

What I used:

  workManager.enqueueUniquePeriodicWork(
            AppConstants.QUEOTES_NOTIFICATION_WORKER_ID,
            ExistingPeriodicWorkPolicy.KEEP,
            request
        )

AppConstants.QUEOTES_NOTIFICATION_WORKER_ID is uniqueWorkName
ExistingPeriodicWorkPolicy.KEEP If there is existing pending (uncompleted) work with the same unique name, do nothing. Otherwise, insert the newly-specified work.

Fire Worker Immediately:

I want to make my periodic worker start immediately i.e run for the first time without waiting for the first iteration of the scheduling

Solution

add next to worker request .setInitialDelay(-1, TimeUnit.MINUTES)

make Periodic tasks start after some time:

We may need our periodic worker to start from future time instead of now, with latest WorkManager this is allowed for both OneTimeWorkRequest and PeriodicWorkRequest with help of .setInitialDelay(10, TimeUnit.MINUTES)

Hope this adds new knowledge for you, meet next time.

A gradle Task to Save your time

Mahmoud Mabrok Fouad — Sat, 25 Dec 2021 18:07:39 +0000

Recently, while running Android Studio I got next error from time to time which waste much time which can be increased based on project size (at least 1 minute, so this amount is multiplied with each build we do):

The process cannot access the file because it is being used by another process.

This can be caused when some plugins run another Java instance so they lock files from one to the other So solution is to kill java process by using:
TASKKILL /F /IM java.exe.

So I searched to make this automated somehow And found we can declare simple gradle task to do this job, it as next( write it at build.gradle)

task killJavaProcess(type:Exec ){
    commandLine 'cmd', '/c', 'TASKKILL /F /IM java.exe'
}

Then to make it be done before each build go to build task at right side of gradle and choose to run before build as next:

Have nice coding.

Resources:

gradle Exec Task type

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